温暗物质（WDM）是理论上性质介于热暗物质和冷暗物质之间的暗物质，经常以惰性中微子作为WDM的代表。

这个温暗物质模型，使得天文物理学家在宇宙各处搜索能合于理论的物质。

Warm dark matter (WDM) is a hypothesized form of dark matter that has properties intermediate between those of hot dark matter and cold dark matter, causing structure formation to occur bottom-up from above their free-streaming scale, and top-down below their free streaming scale. The most common WDM candidates are sterile neutrinos and gravitinos. The WIMPs (weakly interacting massive particles), when produced non-thermally could be candidates for warm dark matter. In general, however the thermally produced WIMPs are cold dark matter candidates.